Allow "messages from the administrator" to be accepted and hidden to increase vertical space

We use the "Message from the administrator" feature to show important information to users about the type of data they can use Collaborator for, however in v11.3.11301 the message is always present at the top of the screen.  There is no way for a user to hide the message and it consumes valuable screen real-estate.  Many of our users review portrait format documents on landscape screens and so being able to hide or move anything that prevents the use of the full vertical size of the monitor would be beneficial.

Please provide an option for users to be able to read, accept and hide the message upon each login.  Better still, provide an option to do that and also to hide/move/shrink the horizontal menu bars.

Thanks!